Carpet cutter blade holder

ABSTRACT

The invention relates to cutter blade holders and cutter blades for use in the manufacture of tufted carpets. The conventional strip like blades slide into the holders and are rigidly located therein by raised projections in the surface of the blade located in slots in the holder.

United States Patent Neale [45] Mar. 28, 1972 s41 CARPET CUTTER BLADEHOLDER 1,813,782 7/1931 Thompson ..30/337 x 2,064,176 12/1936 Parker..30/337 [72] I Inventor: Richard Bernard Neale, Langston, New-2,725,629 l2/l955 Todhunterw England 3,171,201 3/1965 Carlfi ..30/335[73] Assignee: Better Cutting Tools (Newport) Limited,

Newport Great Bmam Primary Examiner-Travis S. McGehee [22] Filed: Dec.23, 1969 Assistant Examiner-J. C. Peters [2]] App] 887 697Attorney-Woodhams,Blancharddz Flynn [30] Foreign Application PriorityData [57] ABSTRACT Dec. 24, 1968 Great Britain ..6l,439/6 The inventionrelates to cutter blade holders and cutter blades for use in themanufacture of tufted carpets. The conventional 52] us. 01 ..30/162,26/8 strip like blades slide into e holders and are rigidly located 511m. 01 ..B26b 29/02 therein y raised pr j ti ns in the surface of theblade [58] Field of Search ..30/162, 329, 335, 336, 337, located in o sin the h e 3 6 8, l0 30/ 38 2 I 9 7Cla1ms,3DrawingF1gures [56]References Cited UNITED STATES PATENTS 1,434,388 11/1922 Hughes ..30/162X Patented March 28, 1972 3,651,571

RICHARD BER/YARO/VEALE CARPET CUTTER BLADE HOLDER The invention relatesto cutter blades and holders for use in machines for cutting yarn in themanufacture of tufted carpets.

It is an object of the invention to provide a blade and holder in whichthe blade is adapted to be quickly and accurately replaced in theholder.

According to the invention there is provided a holder for retaining oneor more blades, in which holder there is provided for each blade twogrooves for slidably retaining a blade in the holder and abutment meansprovided on the holder and blade to restrict the sliding movement of theblade in the holder when the blade is correctly positioned.

The invention is diagrammatically illustrated by way of example in theaccompanying drawings, in which:

FIG. 1 shows a perspective view of a blade;

F IG. 2 shows a perspective view of the holder; and

H0. 3 shows a perpendicular view of a modified holder.

The blade 1 as shown in FIG. 1 has a cutting edge 2 at one end, a hole 3at the other end and two flanges 4 and 4' near the perforated end of theblade.

The flanges 4 and 4' are stamped out of the sides of the blade 1 and areangled with respect to the blade-by a determined amount.

The hole 3 is to enable a hooked tool to be inserted through the hole inthe blade to facilitate its removal from the holder 5.

To insert the blade 1 into the holder 5, the blade is inserted into thegrooves 6 and 6, the cutting edge 2 first, in the direction of the arrow7 until the abutment or flange 4 is engaged in the slot 8 thus rigidlylocating the blade in the holder.

When the blade 1 is inserted into the holder the blade is flexed so thatthe abutment 4 passes over the shoulder 9, thus when the blade 1 isunflexed the abutment 4 is located in the slot 8 thus preventing anylongitudinal movement of the blade.

A ramp 14 is provided so that the blade is simply pushed into the holderuntil the abutment 4 is located in the slot 8. This ramp l4 lessens thepossibility of a person not inserting a blade to its fullest extent intoa holder.

The blade is also firmly held at one end of the holder by the holdergripping the edges of the blade. This gripping action is effected by theblade forcing the grooves 6 and 6' apart so that the holder is tensionedat 10 thus causing the grooves to grip part of the longitudinal edges ofthe blade.

The tension effect between the holder grooves 6 and 6' at 10 is effectedby bore 11 and slot 12 provided between the grooves. The grooves areslightly tapered towards each other so that the distance between thegrooves is slightly less than the width of the blade. Thus when theblade 1 is inserted between the grooves 6 and 6' the grooves at 10 areforced apart, against the spring action of the holder 5, thus firmlygripping part of the longitudinal edges of the blade 1.

To remove the blade from the holder a hooked tool is simply insertedinto the hole 3, the blade is flexed so that the abutment 4 is able topass over the shoulder 9 thus allowing the blade to be withdrawn fromthe grooves 6 and 6.

A groove 13 may be provided in the end of the holder so as to provide ashoulder against which a tool may rest and act as a lever to lift theblade out of the slot 8 prior to the withdrawal of the blade.

As shown in FIG. 3 a second slot 8, with a shoulder 9' may be providedso that the blade may be withdrawn in the holder to a position where itis nonfunctional that is to say in a noncutting position, withoutremoving the blade from the holder.

The forward edge of the slot 8 is provided with a sloping ramp 15 sothat the blade when it is located in the slot 8 can be pushed easilyforwards in the direction of arrow 7 to locate it securely in itscutting position at 8.

A second blade may be disposed on the underside of the holder in asimilar manner to that hereinbefore described.

I claim:

l. A cutter comprising an elongated strip blade having a rear endprovided with a transverse projection and a forward end provided with ashargened cuttin edge, ar rd an elongated blade holder for releasa lybut fixe y receiving therein said blade, said blade holder having asupport surface adapted to support said blade, said blade holder alsohaving wall means extending longitudinally along the opposite edges ofsaid holder from a point located adjacent the forward end of said holderto a point located intermediate the forward and rearward ends of theholder, said wall means defining a pair of opposed grooves adjacent theforward end of the holder for slideably receiving the opposed edges ofthe strip blade when the blade is inserted from the rearward end of theholder to thuslocate and hold the strip blade adjacent the blade supportsurface, said holder also having a recess formed therein between therear end of said grooves and the rearward end of said holder, saidrecess being formed at least in part in said blade support surface forreceiving therein said transverse projection when the cutting edgeformed on the forward end of the blade projects from the forward end ofthe holder, said recess being defined by opposed longitudinally spacedwalls adapted to be disposed on opposite sides of said projection forpositively preventing movement of said blade relative to said holder inthe longitudinal direction thereof when said projection is disposedwithin said recess.

2. A cutter according to claim 1, wherein the rearward end of saidholder is provided with further wall means defining a cam ramp forcausing resilient deformation of at least a part of said strip bladeduring insertion of the strip blade into the holder, whereby saidprojection is then resiliently snapped into said recess when properlyaligned therewith.

3. A cutter according to claim 1, wherein said holder includes meansassociated with said wall means adjacent the forward end of said holderfor resiliently and firmly gripping the opposite edges of said bladeadjacent the forward end thereof.

4. A cutter according to claim 1, wherein said holder has a secondrecess formed therein longitudinally spaced between said first-mentionedrecess and the rearward end of said holder, said second recess beingaligned with and substantially identical to said first-mentioned recessand being adapted to receive therein said transverse projection when theblade is longitudinally slideably moved to a position wherein thecutting edge is in a retracted position wherein it is disposed withinsaid holder.

5. A cutter according to claim 1, wherein the holder is provided withsubstantially identical structure on opposite sides thereof, and whereinthere is provided two substantially identical strip blades disposedsubstantially parallel to each other and mounted on opposite sides ofsaid holder.

6. A cutter according to claim 1, wherein said holder has a pair ofsubstantially parallel and elongated slots formed therein adjacent theopposite longitudinally extending edges thereof, said slots extendinginwardly from the forward end of said holder and terminating at a pointspaced forwardly from the rear ends of said grooves, said slots causingthe forward ends of said wall means to be connected to the remainder ofsaid holder in a cantilever manner, and said wall means as extendinglongitudinally along the opposite sides of said holder converging towardone another in a direction toward the forward end of said holder,whereby the cantilever portions of said wall means are resilientlymovable to resiliently but firmly engage the opposite edges of the bladeto hold same in position within the holder.

7. A cutter according to claim 1, wherein said strip blade comprises anelongated plate-like member having a pair of transverse projectionsprovided adjacent the rearward end thereof, said transverse projectionsbeing disposed adjacent the opposite longitudinal edges of said bladeand projecting laterally outwardly in opposite directions, whereby saidblade can be inserted into said holder with either side thereofconstituting the upper surface of the blade.

1. A cutter comprising an elongated strip blade having a rear endprovided with a transverse projection and a forward end provided with asharpened cutting edge, and an elongated blade holder for releasably butfixedly receiving therein said blade, said blade holder having a supportsurface adapted to support said blade, said blade holder also havingwall means extending longitudinally along the opposite edges of saidholder from a point located adjacent the forward end of said holder to apoint located intermediate the forward and rearward ends of the holder,said wall means defining a pair of opposed grooves adjacent the forwardend of the holder for slideably receiving the opposed edges of the stripblade when the blade is inserted from the rearward end of the holder tothus locate and hold the strip blade adjacent the blade support surface,said holder also having a recess formed therein between the rear end ofsaid grooves and the rearward end of said holder, said recess beingformed at least in part in said blade support surface for receivingtherein said transverse projection when the cutting edge formed on theforward end of the blade projects from the forward end of the holder,said recess being defined by opposed longitudinally spaced walls adaptedto be disposed on opposite sides of said projection for positivelypreventing movement of said blade relative to said holder in thelongitudinal direction thereof when said projection is disposed withinsaid recess.
 2. A cutter according to claim 1, wherein the rearward endof said holder is provided with further wall means defining a cam rampfor causing resilient deformation of at least a part of said strip bladeduring insertion of the strip blade into the holder, whereby saidprojection is then resiliently snapped into said recess when properlyaligned therewith.
 3. A cutter according to claim 1, wherein said holderincludes means associated with said wall means adjacent the forward endof said holder for resiliently and firmly gripping the opposite edges ofsaid blade adjacent the forward end thereof.
 4. A cutter according toclaim 1, wherein said holder has a second recess formed thereinlongitudinally spaced between said first-mentioned recess and therearward end of said holder, said second recess being aligned with andsubstantially identical to said first-mentioned recess and being adaptedto receive therein said transverse projection when the blade islongitudinally slideably moved to a position wherein the cutting edge isin a retracted position wherein it is disposed within said holder.
 5. Acutter according to claim 1, wherein the holder is provided withsubstantially identical structure on opposite sides thereof, and whereinthere is provided two substantially identical strip blades disposedsubstantially parallel to each other and mounted on opposite sides ofsaid holder.
 6. A cutter according to claim 1, wherein said holder has apair of substantially parallel and elongated slots formed thereinadjacent the opposite longitudinally extending edges thereof, said slotsextending inwardly from the forward end of said holder and terminatinGat a point spaced forwardly from the rear ends of said grooves, saidslots causing the forward ends of said wall means to be connected to theremainder of said holder in a cantilever manner, and said wall means asextending longitudinally along the opposite sides of said holderconverging toward one another in a direction toward the forward end ofsaid holder, whereby the cantilever portions of said wall means areresiliently movable to resiliently but firmly engage the opposite edgesof the blade to hold same in position within the holder.
 7. A cutteraccording to claim 1, wherein said strip blade comprises an elongatedplate-like member having a pair of transverse projections providedadjacent the rearward end thereof, said transverse projections beingdisposed adjacent the opposite longitudinal edges of said blade andprojecting laterally outwardly in opposite directions, whereby saidblade can be inserted into said holder with either side thereofconstituting the upper surface of the blade.